[vtk-developers] Additional math functionality

[Philippe P. Pebay]

John Platt wrote:
> Just a comment on math functions that require 2D arrays as arguments.
> When the dimensions are known at compile time, I find it more convenient
> to declare, say,
> 
>  double[3][3] myArray;
> 
>  rather than
> 
>  double* myArrayPtrs[3];
> 
> Jacobi()is a case in mind.
Maybe, maybe not. The double declaration may yield problems when interfacing with Fortran,
doesn't it ?

> Some additional 3x3 matrix transpose functionality would also be useful
> and a 2nd order tensor transformation
Sounds good to me.

And, BTW, the more I think of it, the more it seems that vtkMath may grow a lot -- and as Andy
was also sharing my opinion that we should leave vtkPolynomialSystem apart from vtkMath, I wonder
if we could not split the math tools into a few classes, e.g.,:

1. algebra (vector and tensor manipulation and operators over such, combinatorics)
2. solvers (including linear solvers)
3. vtkPolynomialSystem (that allows symbolic manipulation of polynomials, and systems
of such -- which of course includes manipulating linear systems)
4. and a general vtkMath where we would put useful stuff that cannot be attached to anything else.

P.



> I am not sure whether a templated matrix class is worthwhile.
> 
> John.
> 
> -----Original Message-----
> From: vtk-developers-bounces+jcplatt=lineone.net at vtk.org
> [mailto:vtk-developers-bounces+jcplatt=lineone.net at vtk.org] On Behalf Of
> Will Schroeder
> Sent: 03 November 2005 12:08
> To: vtk-developers at vtk.org
> Subject: [vtk-developers] Additional math functionality
> 
> There has been a request by several VTK developers to move some math 
> functionality into VTK (mainly polynomial root solvers). We are 
> talking several thousand lines of code. Of course we could just cram 
> it into vtkMath, take the ITK approach and include a math library, or 
> create new math classes, etc. At this point I am looking for opinions.
> 
> Will
> 
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-- 
Philippe P. Pebay                |      pppebay at ca.sandia.gov
Sandia National Laboratories     |     Phone: +1 925 294 2024
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